you can adj you pressure from 0-250ish and can be made to go higher
They are easy to adj is some what easy to take down. If you need help just go to www.smartparts.com they have a step by step way to do it. Can lock down so the pressur stays the same.

Weaknesses:

Can only lube with dow 33. Other than that nothing.

Conclusion:

If you have a LP gun this will work great out of the box. On SP impulse and shockers this is a must for me i have to have one.
all in all this is a good product. buy it